Credible synchronization method of distributed network equipment

A distributed network and equipment technology, applied in the computer field, can solve problems such as forwarding interruption and routing oscillation, and achieve the effect of ensuring reliability, guaranteeing redundant backup, and realizing reliable transmission.

Inactive Publication Date: 2008-03-05
WUHAN FIBERHOME NETWORKS
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Problems solved by technology

[0024] GR technology introduction: When the core device in the network is restarted, all routing protocols need to be re-run. Since the device has no knowledge of the topology of the outside world at this time, it needs to re-interact with the outside world. According to the normal operation of the original routing protocol At this time, the neighbor relationship between the peripheral device and the local machine will be rebuilt, and all routing information data will be resynchronized, which is no different from a newly discovered neighbor.
On the peripheral device, the routing calculation will be triggered due to the short-term interruption of the neighbor relationship, so it will still cause routing oscillation and forwarding interruption on the network.

Method used

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  • Credible synchronization method of distributed network equipment
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  • Credible synchronization method of distributed network equipment

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Embodiment Construction

[0042] The invention provides a reliable point-to-point transmission method on the link layer, and has QoS guarantee at the same time. Not only can it perform reliable transmission similar to the TCP handshake protocol, but also can quickly and directly send and receive data that does not need reliable transmission like the UDP protocol. The principle is: both masters maintain a sending buffer and a receiving buffer. The sending buffer is used to store unconfirmed packets sent out, and the receiving buffer is used to store received but out-of-order packets. The receiving buffer has been ordered. The packets are directly handed over to the corresponding upper layer for processing. The sender maintains the local variable ack_expected (the lowest sequence number of the packet sent by the sender) and next_seq_to_send (the maximum sequence number sent by the sender + 1); the receiver maintains the local variable seq_expected (the minimum sequence number expected to be received), if...

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Abstract

The invention realizes following functions synthetically: implementing state negotiation among main and standby control cards of exchanger in core layer; reliable point-to-point transmission among main and standby control cards under QoS is ensured; reliable synchronization between network management information and route management information among main and standby control cards of exchanger in core layer; implementing compression algorithm in time for synchronizing batch data. Moreover, gentler synchronization between main and standby control cards is implemented so as to guarantee high reliability of core equipment in network layer.

Description

technical field [0001] The invention belongs to the field of computer technology, and relates to the synchronization and switching technology between the main and standby control cards of the core layer rack switch. Background technique [0002] High reliability is an essential feature of carrier-grade equipment. The high reliability of the system can quickly and accurately restore the normal operation of the system in the event of a failure, thereby shortening the MTTR (Mean Time To Repair) of the system. [0003] With the growth of data traffic and the improvement of service quality requirements, high reliability has increasingly become one of the most important features of high-performance networks. The high availability of the network means that the system obtains the maximum running time at a limited cost, and minimizes the loss of service interruption caused by failures. A network system with high availability needs to minimize hardware and software failures on the o...

Claims

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Application Information

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IPC IPC(8): H04L1/22H04L12/24
Inventor 罗婷汪学舜
Owner WUHAN FIBERHOME NETWORKS
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